Gas Monitor Calibration Equipment & Stations

Gas monitor calibration involves exposing the detector to a certified calibration gas of known concentration and adjusting the instrument's output to match that reference value. First, allow the monitor to warm up, then connect a NIST-traceable calibration gas cylinder via a demand-flow regulator. Apply gas to the sensor, observe the reading, and use the monitor's calibration controls to align the response. Always follow the manufacturer's specific calibration protocol.

Most manufacturers and safety standards recommend calibrating gas monitors at least every 6 months, though many industries and regulatory bodies such as OSHA recommend more frequent calibration — often monthly or after any event that may have affected sensor accuracy, such as exposure to extreme conditions, sensor replacement, or a failed bump test. High-risk environments like confined spaces or petrochemical facilities typically require more frequent schedules.

A bump test is a quick functional check that exposes the gas monitor to a known concentration of target gas to verify the sensor and alarm respond correctly — it does not adjust the instrument. Full calibration involves adjusting the monitor's output to match a certified NIST-traceable reference gas concentration. OSHA guidelines typically require bump testing before each shift in hazardous environments, with full calibration performed periodically or after a failed bump test.

Common calibration gases include Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Oxygen (O2), Methane (CH4), Ammonia (NH3), Nitric Oxide (NO/NOx), Sulfur Dioxide (SO2), Chlorine (Cl2), Phosphine (PH3), and various VOCs. SpecGas Inc. produces NIST-traceable calibration gas mixtures across all these gas types in PPB to percent-level concentrations, blended in disposable and refillable cylinders for field and laboratory use.

NIST-traceable calibration gas means the gas mixture's certified concentration has been verified through an unbroken chain of comparisons to national measurement standards maintained by the National Institute of Standards and Technology (NIST). This traceability ensures accuracy, regulatory compliance, and reproducibility. SpecGas Inc. produces all calibration gas standards with full NIST traceability using gravimetric blending methods and state-of-the-art analytical equipment.

Yes. SpecGas Inc. offers fully custom gas mixture blending to customer-specified concentrations, tolerances, balance gases, and cylinder types. Whether you need PPB-level reactive gas mixtures, multi-component blends, or specific cylinder configurations, SpecGas can accommodate these requirements with adaptable tolerances and the fastest lead times in the specialty gas industry. Contact SpecGas at (215) 443-2600 to discuss your specifications.